Patents by Inventor Hwa-Dong Liang

Hwa-Dong Liang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Artificial Christmas tree
    Patent number: 6180194
    Abstract: The leaves of an artificial Christmas tree are each formed from a length of metal having its opposite ends secured to a tree trunk and a plurality of coils formed along the length thereof and having substantially the configuration of a coiled spring. A reinforcing member may extend through the coils and separate ornaments may be individually hung on selected coils.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: January 30, 2001
    Inventor: Hwa-Dong Liang